When importing document with text containing char code mapped to .notdef glyph name an ArgumentException: 'The encoding is not supported.' is thrown.

NullReferenceException has thrown when importing a form XObject with null Resources in PDF dictionary.

Add a PDF document validator to validate (before the import of the document) an existing PDF document.

 InvalidCastException when importing a file with missing space. The file contains no space between the objects declarations and the page content and this is why the exception occurs.

When importing a VariableContent widget with OpenType font, which fails to read the post table of the font file, a NullReferenceException is thrown when the RecalculateContent() method is called.

Workaround: Change the widget font:

foreach (Widget widget in textBoxField.Widgets)
{
    widget.TextProperties.Font = FontsRepository.Helvetica;
    widget.RecalculateContent();
}

More information is available in the Pdf Reference 1.7. Page 442 lists all predefined CMaps that should be imported and exported as PdfName objects. At this point, trying to import a document with such encoding, a NotSupportedException is thrown with message Encoding type is not supported.

Telerik Pdf Processing Cannot open the attached pdf file and exception occur.

How do i slove it?

Code :
  RadFixedDocument document = new PdfFormatProvider().Import(input);

Exception Message :
   System.UriFormatException  無效的 URI: 無法剖析主機名稱。

Source :
   Telerik.Windows.Documents.Fixed

Stack Trace :

於 System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   於 System.Uri..ctor(String uriString, UriKind uriKind)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Actions.UriActionObject.ToAction(PostScriptReader reader, IRadFixedDocumentImportContext context)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Annotations.LinkObject.ToAnnotationOverride(PostScriptReader reader, IRadFixedDocumentImportContext context)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.Annotations.AnnotationObject.ToAnnotation(PostScriptReader reader, IRadFixedDocumentImportContext context, Double pageHeightInDip)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.Page.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context, RadFixedPage fixedPage)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPagePropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Model.Elements.DocumentStructure.DocumentCatalog.CopyPropertiesTo(PostScriptReader reader, IRadFixedDocumentImportContext context)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.RadFixedDocumentImportContext.BeginImportOverride()
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.BaseImportContext.BeginImport(Stream pdfFileStream)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.Import.PdfImporter.Import(Stream input, IPdfImportContext context)
   於 Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.ImportOverride(Stream input)
   於 Telerik.Windows.Documents.Common.FormatProviders.FormatProviderBase`1.Import(Stream input)
   於 Telerik.Windows.Documents.Common.FormatProviders.BinaryFormatProviderBase`1.Import(Byte[] input)

The underline gets over the text when the line spacing is set to exact, spacing after is set to 0, and the font size is less than 12.

The checkbox state is not correctly imported when the value is not specified

A submit-form action transmits the names and values of selected interactive form fields to a specified uniform resource locator (URL), presumably the address of a Web server that will process them and send back a response. Preserve the existing submit-form actions in the document and expose functionality enabling the users to create or modify such actions.

The calculations are wrong, leading to single lines split by the LineSpacing set. As a result, the content of the PDF document is laid out on a bigger number of pages.

Workaround: Change the LineSpacingType to HeightType.Auto.

The current implementation relies on valid cross-reference offsets in the PDF documents so that PDF objects are easily found and parsed. However, we may implement a mechanism for importing documents with invalid offsets for the objects inside the table.

At this point, the setting paragraph Borders is not supported.

A possible workaround could be to draw a rectangle around the desired Block.

At this point, the justify alignment is not supported.
Note: When implementing this functionality, ensure that there an is appropriate public API for setting the text alignment to Justify

Currently, the ListLevel object doesn't provide an API for changing the passing of the Bullets.

NullReferenceException is thrown when importing a PDF document containing InlineImage with missing parameters

When the document contains Simple Font with predefined encoding and no ToUnicode mapping the text should be extracted with the following algorithm:

• Map the character code to a character name according to the font’s Differences array.
• Look up the character name in the Adobe Glyph List to obtain the corresponding Unicode value. 
  

Currently, the PdfProcessing library doesn't map the character code properly which leads to wrongly encoded text content.

CryptographicException is thrown when saving with PdfStreamWriter or importing with PdfFormatProvider.

The exception: System.Security.Cryptography.CryptographicException: 'The input data is not a complete block.'

The Form object does not inherit the graphics state of the page

Currently Type0Font class has CMap that can only be Identity-H. The Identity-V is a vertical version of Identity−H. The mapping is the same as for Identity−H.